Mumford & Sons are nominated in the categories for Best Rock Song and Best New Artist. Previously, we looked at Florence + The Machine‘s chances in the latter category and with them having the highest scrobble count in the category (33,496,510 total scrobbles), you would have to favor them to swing the award.

However, Mumford’s 15,864,168 total scrobble count is not to be sniffed at, especially due to the band’s arguably niche sound.

In the Best Rock Song category the band are nominated for their song “Little Lion Man.” The song is their most scrobbled track on Last.fm, boasting 2,366,878 scrobbles to date.

With Muse being one of the most scrobbled artists ever on Last.fm (a frightening 197,848,332 scrobbles) it would take a confident man to bet against them winning Best Rock Song. But Mumford & Sons have come a long way in such a short space of time, and even if they don’t manage to win Best Rock Song, you could say they have a great chance of bagging Best New Artist.

Mumford & Sons are also tapped to perform at a special Grammy Awards pre-party Feb. 12 at The GRAMMY Museum at L.A. Live, hosted by CBS Radio LA and CBS Interactive Music. And this only weeks after landing the Number 2 spot on Last.fm’s Best of 2010. So whether or not they take home a statue (or two) the following night, this London quartet has already earned tremendous success and is still trending upward.

Make sure to tune into the Grammy Awards on CBS on February 13. In the meantime check back with Last.fm Trends every weekday as we run up to the awards.